Rough and odd edges on mesh objects
For what it looks like you're trying to do, it would probably be best to use Freestyle, which detects edges in your scene and outlines them. That way you can forget about the wireframe and let Freestyle handle that.

You turn on Freestyle from the Render settings, the leftmost tab of the Properties panel.

It has one option in the Render tab, whether line thickness is absolute (pixels) or relative to image size, and all the  rest  are in the  Render Layers tab, one to the right. Here you can tweak everything about Freestyle—the color and thickness of the lines, which edges are drawn over, and a whole lot more.